// Copyright (c) 2023 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ============================================================================
#pragma once
#include <iostream>

class AlibiEmbedding {
public:
    AlibiEmbedding(const int headNum, const int seqLen);

    ~AlibiEmbedding() {
        maxLen = 0;
        maxHeadNums = 0;
        if (posMatrix != nullptr) free(posMatrix);
        if (slopeM != nullptr) free(slopeM);
    }

    void alibiGetRelativePos(const int seqLen);

    void alibiGetSlope(const int headNum);

    // headIdx is [0,n]
    void alibiGetBias(const int headIdx, const int seqLen, float *bias_matrx);

private:
    int maxLen = 0;
    int maxHeadNums = 0;
    int *posMatrix;
    float *slopeM;
};
